package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
* @author 86189
* @description 针对表【category(菜品及套餐分类)】的数据库操作Service实现
* @createDate 2024-09-03 19:42:30
*/
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category>
    implements CategoryService{
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> dishWrapper = new LambdaQueryWrapper<>();
        LambdaQueryWrapper<Setmeal> setmealWrapper = new LambdaQueryWrapper<>();
        //查询当前分类是否关联菜品 关联抛出业务一场
        dishWrapper.eq(Dish::getCategoryId,id);
        int count=dishService.count(dishWrapper);
        if(count>0){
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        //查询当前分类是否关联套餐 关联抛出业务一场
        setmealWrapper.eq(Setmeal::getCategoryId,id);
        int count1=setmealService.count(setmealWrapper);
        if(count1>0){
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }
        //正常删除
        super.removeById(id);
    }
}




